Precon Products, A leading national independent supplier of construction products

Pressure Tight Sealing Plugs

  • STOPPERs are plugs which were developed for pressure-tight sealing of fibre cement and plastic distance tubes with an inner diameter of 22mm
  • High-strength plastic specially developed for this application
  • Temperature range -35°C to +70°C. If the plugs are installed at
  • ambient temperatures below 0°C, they must be stored above freezing
  • point beforehand for a better installation. All-weather installation
  • Just drive them in and they are tight
  • Little storage space required


Since plastic and fibre cement distance tubes with a specified internal diameter of 22mm are subject to manufacturing tolerances, further extended tests were carried out at MFPA in Leipzig for an internal diameter of 21.5 to 23mm.


  • Fire resistance class El 120 as per DIN EN 13501-2 Room closure test with fibre cement distance tubes
  • For the duration of the test (120 minutes), no cracks or gaps
  • developed on the room side. During this time, no flames were visible on the side facing away from the fire
  • Construction material class DIN EN 13501-1 E = normally flammable
  • DIN 4102-1 B2 = normally flammable


As well as undergoing a comprehensive slurry/liquid manure/silage effluent test, the plastic is also resistant to several media:

  • Slurry
  • Liquid manure
  • Silage effluent
  • Fermentation mash
  • Radon + methane gas UV radiation
  • Ozone
  • Bitumen

Tested for acid resistance.

After consultation on the composition

  • Diluted acids + alkalis
  • Oils

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